diff --git a/lib/oauthutil/renew.go b/lib/oauthutil/renew.go
index e3652ee9c..40eab7843 100644
--- a/lib/oauthutil/renew.go
+++ b/lib/oauthutil/renew.go
@@ -88,7 +88,9 @@ func (r *Renew) Shutdown() {
 	}
 	// closing a channel can only be done once
 	r.shutdown.Do(func() {
-		r.ts.expiryTimer.Stop()
+		if r.ts != nil {
+			r.ts.expiryTimer.Stop()
+		}
 		close(r.done)
 	})
 }